!! Warning: This hanjie is a linea, it is only logical with the constraint that the picture consists of a single curved line, thus each black cell has exactly two of its four nearby cell blacks (except the two ends) !!

That will be easy to find the good keys...

You can play the first season of "Linea" to perform your skills.

Difficulty : **

Tested, logical (as a linea).
Can be solve without edge-logic.
Good blackenage.